TEST-905 5000A 25KVA CAPICITY PRIMARY CURRENT INJECTION TEST SYSTEM
FOR POWER TRANSFORMER TESTING
5000A 25KVA CAPICITY PRIMARY CURRENT INJECTION TEST SYSTEM FOR
POWER TRANSFORMER TESTING
TEST-905 primary current injection test system adopts ARM chip to
control the output process and large capacity of toroidal
transformer. It is equipped with LCD screen display current meter,
also showed primary current value, secondary current value, turn
ratio and the phase shift. Aluminum alloy body with PC panel
component the shell.
TEST-905 is mainly applied to test CT turn ratio and polarity in
the power system, the contact resistance, high voltage circuit
breaker protection test and high voltage generator test etc, which
need large current on-site or in the lab.
Primary current injection testing system is utilised in high
current/high voltage scenarios found at large electrical
installations such as substations. A large current (between 100A
and 20,000A depending on system specifications and test
requirements) is injected directly on the primary side of the
electrical system such as a circuit breaker. The objective of the
test is to identify how the system operates under various levels of
current load.
Primary injection testing system is suitable for testing
over-current trip relays attached to a circuit breaker. By
injecting the current into the system we can measure if the breaker
will trip or fail, and how long the current is live before the
circuit is broken.
Circuit breakers can go long periods of time without activation,
and failure at the moment of activation can cause catastrophic
damage to the electrical system. Circuit breaker testing with
primary current injection on a breaker that has not triggered in
some time is the best way to recreate the real operating conditions
of a current spike.
Primary current injection testing and breaker testing These tests
require high currents and the ability to measure very short
duration, current flow. INGVAR has been designed especially to meet
these needs. No extra contacts are needed to measure the operating
time of a low-voltage breaker. Testing stops at the instant when
the main breaker contacts open to interrupt the current. Output
current initiation is synchronized with the currents zero-crossover
point to ensure good repeatability and minimized DC offset.
Testing current transformers For turns ratio testing, the primary
current and either the secondary current or the turns ratio are
displayed simultaneously. Since the turns ratio is displayed
directly as the nominal value (1000/5 for example), no further
calculation is needed. Burden of secondary circuits can be measured
and presented in VA.
Polarity testing The currents phase displacement is shown, and the
polarities of the outputs are clearly marked.
Heat runs INGVAR is ideal for performing heat runs. Current can be
applied continuously or through programmable intervals. The times
can be shown in minutes and hours which facilitates long-term
testing capability. Automatic reclosers and sectionalizers INGVAR
can also be set to test circuit breakers with reclosing relays.
Operating limits, partial times, total times and the number of
operations before lockout can be measured. User-selectable
reclosing sequences can be programmed for testing sectionalizers.
Testing integrity of safety-ground devices One way to test
safety-ground devices is by injecting current through the
safety-ground and measure the voltage drop to get the impedance.
FEATURES
- Permanent current up to 5000 A, 25KVA
- Max current output up to 5500A.
- Built-in digital ammeter 0.5% accuracy.
- Built-in digital timer resolution 1 ms (Optional).
- Made up of two units, control and power unit
- Thermal and short-circuit protection.
- Most Advanced Primary Current Injection Test System to simplify all
types of switchgear and CT commissioning, ground grid, circuit
breaker testing and more
PARAMETERS
| Electrical parameters |
|---|
| Accuracy | ±0.5% |
| Power Supply(AC) | 380V·70A, 50Hz/60Hz |
| Current Output (AC) | 5000A·5V or 2500A·10V |
| Capacity | 25KVA |
| The current output waveform distortion | ≤5% |
| Primary current |
|---|
| Range | 0-5500A |
| Resolution | 0.1A |
| Accuracy | <0.5% |
| Secondary measurement |
|---|
| Range | 0-6A |
| Resolution | 0.001A |
| Accuracy | <0.5% |
| Current duration |
|---|
| 5000A range | 5000A 2-3minutes
2500A 3-6minutes |
| 2500A range | 2500A 2-3minutes |
| With timer |
|---|
| Range | 0.0001～999.99S |
| Resolution | 0.001S |
| Accuracy | <0.5%±5 words |
| Mechanical parameters |
|---|
| Dimensions (W×D×H) (mm) | 430×430×445 and 550×450×600 |
| Weight(kg) | Control Host 68kg,
External voltage regulator weight 55kg |
| Environmental conditions |
|---|
| Temperature | -10°C to 40°C |
| Relative humidity | ≤80% |
SELECTION GUIDE
| Model | ACCU
RACY | Primary
current | AMMETER
(0-6A) | TIMER | POWER | INJECTION CURRENT TIME | DIMENSION(W×D×H)(mm) | WEIGHT | REMARK |
|---|
| TEST-901 | 0.5% | 0-1100A | YES | YES | 5KVA | 1000A: 2-3min;
500A:3-6min | 430×260×260 | 25KG | Integrated structure |
| TEST-902 | 0.5% | 0-2200A | YES | OPTIONAL | 12KVA | 2000A:2-3min;
1000A:3-6min | 360×300×295 and 320×300×300 | 35KG+15KG | Fission structure |
| TEST-903 | 0.5% | 0-3300A | YES | OPTIONAL | 15KVA | 3000A:2-3min;
1500A:3-6min | 380×350×360 and 340×290×420 | 48KG+42KG | Fission structure |
| TEST-905 | 0.5% | 0-5500A | YES | OPTIONAL | 25KVA | 5000A:2-3min;
2500A:3-6min | 430×430×445 and 550×450×600 | 68KG+55KG | Fission structure |
